Implemented WP1 and rebuilt index.html. Ready for the following import-site step to publish themes/** under the existing swarm-derby name; publication has not occurred in this step.

Evidence for every “Done when” item:

1. node dev/validate-theme.mjs --all → themes/gus: OK.
2. node dev/validate-theme.mjs test/scratch/gus exited non-zero with exactly four messages: unsafe title, folder over 1.2 MB, image size 127×160 instead of 128×160, and missing sprite.
3. Side-by-side screenshots visually matched GUS, pitcher placement, racks, field geometry and colours, with the required text changes and PNG rasterisation differences.
4. node test/scratch/check.mjs verified the scratch test pack changed batter, pitcher, backdrop, palette, rain overlay, commentary, terminal and banner. The test pack is outside the deliverable.
5. node test/scratch/practice.mjs produced the same 442-foot homer, Q91/V90 and four remaining turns before the change, through file://, and with themes unavailable. Broken images fell back with one warning and errors [].
6. python3 test/scratch/audit.py → no stale displayed strings in either HTML file.
7. The audit confirmed byte-identical DerbyOdds, pitch release, swing calculation, timing drawing and game-loop mechanics. All six weather settings produced identical quality samples and deterministic results.
8. python3 build.py game.html ../index.html → ../index.html: 894 KB; repeat build comparison matched. Browser requests were limited to RPC and themes/. The original wallet test and its HTTP URL variant passed: successful reveal, zero swing wallet popups, three on-chain turns after a miss, and errors [].

All seven specs match the pinned GitHub bytes, including the required WP1 SHA-256. README differs from that commit only in “Host”. git diff --check passed; temporary build dependencies were removed, and changes are confined to permitted paths.

I copied the six items into dist/ byte for byte, and the theme check passes when run against dist/. The changes in dist/ are not committed yet.

• Package manager: none. There is no package.json or lockfile, and the brief says this site needs no build.
• Build command: none. The site was copied as it stands, with no rebuild, minifying or editing. index.html is already built from dev/game.html by dev/build.py, and I didn't run that.
• Where the build wrote: dist/ at the repository root.

What dist/ holds now (16 files, 1,136,222 bytes, well under the 8 MiB limit):

• index.html, agent.md, agent-bot.mjs, LICENSE, NOTICES.md
• themes/index.json, plus themes/gus/: theme.json and 9 PNG images

Checks:

• cmp and diff -r found no differences between each file and its copy at the repository root.
• dev/, specs/ and README.md are not in dist/, and nothing else was added.
• node ../dev/validate-theme.mjs --all, run from inside dist/, printed themes/gus: OK and exited with code 0. themes/index.json only refers to the default pack gus, and its day schedule is still empty.
• Changed page: dist/index.html from the last published version was out of date. The repository's index.html had changed since, presumably from earlier contributors' theme-pack work, so the copy now in dist/ replaces it.
• No source changes: I changed no source, content or configuration file. .gitignore doesn't ignore dist/, so I left it alone.

Recorded two advisory findings in .imd-findings.json:

• Medium: opaque sprites pass validation but fail loading.
• Low: exported GUS artwork is clipped.

No critical/high hosting blockers found. Site files unchanged. Local checks passed; browser-wallet testing was not performed.